Pump coupling



FIG. 1 is a perspective view of the present invention depicting a first end of the pump coupling;

FIG. 2 is a perspective view of the invention depicting a second end of the pump coupling shown in FIG. 1;

FIG. 3 is a side view in elevation of the pump coupling;

FIG. 4 is a side view in elevation of the pump coupling as shown in FIG. 3, rotated 180°;

FIG. 5 is a plan view of the pump coupling, as depicted in FIG. 1; and,

FIG. 6 is a side view in elevation of the first end of the pump coupling depicted in FIG. 1. 

The ornamental design for the pump coupling, as shown and described herein. 